#!/usr/bin/env sh

# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-License-Identifier: GPL-3.0-only

Fail(){
	if [ ! -z ${@+x} ]; then
		printf "\nERROR: ${@}\n"
	fi

	cat <<- EOF
	USAGE: ./blobutil inject -r [/path/to/rom] -b [boardname] -m [macaddress]
	Example: ./blobutil inject -r x230_12mb.rom -b x230_12mb

	Adding a macadress to the gbe is optional.
	If the [-m] parameter is left blank, the gbe will not be touched.

	Type './blobutil inject listboards' to get a list of valid boards
	EOF

	exit 1
}

Modify_gbe(){
	rom=${1}
	printf "changing mac address in gbe to ${new_mac}\n"
	_gbe_location=${CONFIG_GBE_BIN_PATH#../../}

	if [ ! -f util/nvmutil/nvm ]; then
		make -C util/nvmutil || Fail 'failed to build nvmutil'
	fi

	_gbe_tmp=$(mktemp -t gbeXXXX.bin)
	cp ${_gbe_location} ${_gbe_tmp}
	./util/nvmutil/nvm ${_gbe_tmp} setmac ${new_mac} || Fail 'failed to modify mac address\nmake sure the mac address in the correct format'
	
	./coreboot/default/util/ifdtool/ifdtool -i GbE:${_gbe_tmp} ${rom} -O ${rom} || exit 1

	rm ${_gbe_tmp}
}

listboards() {
	for boarddir in resources/coreboot/*; do
		if [ ! -d "${boarddir}" ]; then continue; fi
		board="${boarddir/##resources/coreboot/}"
		board="${board%/}"
		printf '%s\n' "${board##*/}"
	done
}

# This function tries to determine the board from the filename of the rom.
# It will only succeed if the filename is not changed from the build/download
Detect_board(){
	path=${1}
	filename=$(basename ${path})
	case ${filename} in
		grub_*)
		board=$(echo "${filename}" | cut -d '_' -f2-3)
		;;
		seabios_withgrub_*)
		board=$(echo "${filename}" | cut -d '_' -f3-4)
		;;
		*.tar.xz)
		_stripped_prefix=${filename#*_}
		board="${_stripped_prefix%.tar.xz}"
		;;
		*)
		return 1
	esac	

	if [ -d "resources/coreboot/${board}/" ]; then
		printf '%s\n' "${board}"
	else
		return 1
	fi
}

Patch(){
rom="${1}"
set -- "resources/coreboot/${board}/config/*"
. ${1} 2>/dev/null
. "resources/coreboot/${board}/board.cfg"

	if [ "$CONFIG_HAVE_MRC" = "y" ]; then
		printf 'adding mrc\n'
		./coreboot/default/util/cbfstool/cbfstool ${rom} add -f mrc/haswell/mrc.bin -n mrc.bin -t mrc -b 0x78fe00 || exit 1
	fi

	if [ "${CONFIG_HAVE_ME_BIN}" = "y" ]; then
		_me_location=${CONFIG_ME_BIN_PATH#../../}
		printf 'adding intel management engine\n'
		./coreboot/default/util/ifdtool/ifdtool -i me:${_me_location} ${rom} -O ${rom} || exit 1
	fi

	if [ "${modifygbe}" = "true" ] && ! [ "${release}" = "true" ]; then
		Modify_gbe ${rom}
	fi
}

Patch_release(){
	_tmpdir=$(mktemp -d "/tmp/${board}_tmpXXXX")
	tar xf "${releasearchive}" -C "${_tmpdir}" || \
	Fail 'could not extract release archive'
	
	for rom in ${_tmpdir}/bin/*/*.rom ; do
		echo "patching rom $rom"
		Patch ${rom} || \
		Fail "could not patch ${rom}"
	done

	( cd ${_tmpdir}/bin/*
	sha1sum --status -c blobhashes || \
	Fail 'ROMs did not match expected hashes'
	)
	

	if [ "${modifygbe}" = "true" ]; then
		for rom in ${_tmpdir}/bin/*/*.rom ; do
			Modify_gbe ${rom}
		done
	fi

	if ! [ -d bin/release ]; then
		mkdir -p bin/release
	fi

	mv ${_tmpdir}/bin/* bin/release/ && \
	printf '%s\n' 'Success! Your ROMs are in bin/release'

	rm -r "${_tmpdir}"
}

Check_release(){
if ! [ -f ${1} ]; then
	return 1
fi

_filetype=$(file -b "${1}")

if [ "${_filetype%%,*}" = "XZ compressed data" ]; then
	printf "%s\n" "Release archive ${1} detected"
else
	return 1
fi
}

if [ "${1}" = "listboards" ]; then
	listboards
	exit 0
fi

# Implementing parameter parsing now so more options can be added later
while getopts r:b:m: option
do 
    case "${option}"
        in
        r)rom=${OPTARG};;
	b)board=${OPTARG};;
	m)
		modifygbe=true
		new_mac=${OPTARG}
		;;
    esac
done



if ! Check_release ${1} ; then
	if [ ! -f "${rom}" ]; then
		Fail "${rom} is not a valid path"
	elif [ -z ${rom+x} ]; then
		Fail 'no rom specified'
	elif [ -z ${board+x} ]; then
		board=$(Detect_board ${rom}) || \
		Fail 'no board specified'
	fi
else
	release=true
	releasearchive="${1}"
	board=$(Detect_board ${1}) || \
	Fail 'Could not detect board type'
fi


if [ ! -d "resources/coreboot/${board}/" ]; then
	Fail "board ${board} not found"
fi

if [ ! -d coreboot/default ]; then
	printf "downloading coreboot\n"
	./download coreboot default
fi

if [ ! -f "coreboot/default/util/ifdtool/ifdtool" ]; then
printf "building ifdtool from coreboot\n"
	./build module cbutils default || Fail 'could not build ifdtool'
fi

if [ ! -f "coreboot/default/util/cbfstool/cbfstool" ]; then
printf "building cbfstool from coreboot\n"
./build module cbutils default || Fail 'could not build cbfstool'
fi

./blobutil download ${board} || \
Fail "Could not download blobs for ${board}, check network connection"

if [ "${release}" = "true" ]; then
	echo 'patching release file'
	Patch_release
else
	Patch ${rom}
fi
